1. The computer is absolutely ______ amazing technological revolution. Just imagine what ______ fun it is playing computer games over the weekend!
A. the; the B. an; 不填 C. 不填；a D. an; a
2. In the past few years, so many areas throughout the world have been hit by such destructive earthquakes, snowstorms and tsunamis ______ we have never experienced before, ______ makes us worried a lot about nature disasters.
A. that; that B. as; which C. which; it D. when; as
